本机可双轮速度压力及鞋唇厚度可调整，利用双轮压紧鞋子唇边线沟，使车线角度更加美观明显。
the speed & pressure of tow-rollers, and the thickness of upper bottom-rim are available to be adjusted on.
this machine is designed for stiching-line of upper bottom-rim to be shaped good,by pressing function from these two rollers.